78813471 has 12 divisors (see below), whose sum is σ = 115506776. Its totient is φ = 47765520.

The previous prime is 78813461. The next prime is 78813509. The reversal of 78813471 is 17431887.

It is not a de Polignac number, because 78813471 - 2¹¹ = 78811423 is a prime.

It is a super-3 number, since 3×78813471³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78813461) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 108196 + ... + 108921.

Almost surely, 2^78813471 is an apocalyptic number.

78813471 is a deficient number, since it is larger than the sum of its proper divisors (36693305).

78813471 is a wasteful number, since it uses less digits than its factorization.

78813471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217142 (or 217131 counting only the distinct ones).

The product of its digits is 37632, while the sum is 39.

The square root of 78813471 is about 8877.6951400687. The cubic root of 78813471 is about 428.7460693172.

The spelling of 78813471 in words is "seventy-eight million, eight hundred thirteen thousand, four hundred seventy-one".